Quote Originally Posted by BKratchmer View Post
Not to muddy the water... but unless I've forgotten everything from my Micro classes, a micron is one-millionth of a meter...
I think it is roughly 1/30,000 of an inch... Could be wrong. Will grab a chem/microscopy book and check.
I believe that is right - 25 microns = .001"

The true philosophical question here is how many angels (spelling is correct) can we fit onto a 30K abrasive particle?